1B56

HUMAN RECOMBINANT EPIDERMAL FATTY ACID BINDING PROTEIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Expression, purification, and crystal structure determination of recombinant human epidermal-type fatty acid binding protein.

Hohoff, C.Borchers, T.Rustow, B.Spener, F.van Tilbeurgh, H.

(1999) Biochemistry 38: 12229-12239


  • PubMed Abstract: 
  • We describe the crystal structure of human epidermal-type fatty acid binding protein (E-FABP) that was recently found to be highly upregulated in human psoriatic keratinocytes. To characterize E-FABP with respect to ligand-binding properties and tert ...

    We describe the crystal structure of human epidermal-type fatty acid binding protein (E-FABP) that was recently found to be highly upregulated in human psoriatic keratinocytes. To characterize E-FABP with respect to ligand-binding properties and tertiary structure, we cloned the respective cDNA, overexpressed the protein in Escherichia coli and purified it to homogeneity by a combination of ion-exchange and size-exclusion chromatographic steps with a yield of 30 mg/L broth. The purified protein revealed a 5-fold higher affinity for stearic acid than for oleic and arachidonic acids. The crystal structure of recombinant human E-FABP was determined to 2.05 A and refined to an R(factor) of 20.7%. The initial residual electron density maps clearly showed the presence of a ligand, which was identified as endogenous bacterial fatty acid. Within a central cavity of 252 A(3), this ligand is bound in a U-shaped conformation, its carboxyl group interacting with tyrosine 131 and arginines 129 and 109, the latter via an ordered water molecule. The E-FABP crystal structure is unique in the FABP family because of the presence of a disulfide bridge between cysteines 120 and 127 that may be physiologically as well as pathophysiologically relevant. Cysteines 67 and 87 are also in close vicinity but in contrast do not form a disulfide bridge. We postulate that this protein belongs to a particular FABP subfamily whose members share common structural as well as functional features.


    Organizational Affiliation

    Institut für Biochemie, Westfälische Wilhelms-Universität Münster, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FATTY ACID BINDING PROTEIN
A
135Homo sapiensMutation(s): 0 
Gene Names: FABP5
Find proteins for Q01469 (Homo sapiens)
Go to Gene View: FABP5
Go to UniProtKB:  Q01469
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PLM
Query on PLM

Download SDF File 
Download CCD File 
A
PALMITIC ACID
C16 H32 O2
IPCSVZSSVZVIGE-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PLMKi: 802 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.207 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 63.450α = 90.00
b = 63.450β = 90.00
c = 76.720γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
X-PLORphasing
X-PLORmodel building
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-10-05
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance